MU heads not taking on any cargo

[BobDendry]

I'm not sure if this is a problem with OTTD or the GRF (I'd point toward the GRF since I'm the one coding it), but I'm experiencing a problem where any MUs/articulated engines aren't taking on cargo. I have a number of vehicles coded as either multiheads or as articulated that should be picking up passengers (listed in the purchase list/capacities screen on the vehicle window) which aren't picking up passengers. If they're the only train servicing a station, they'll trigger passengers to start building up there, but won't actually pick any up?

I've tried searching but haven't found any similar issues reported. Any advice?

(running 1.4.1)

[Eddi]

have you checked the train info window on whether they actually have capacity?

can you attach a test grf to reproduce?

[juzza1]

Check the loading speed of the vehicles.

[BobDendry]

Loading speed has fixed it. I guess I was under the false assumption that not setting a loading speed prop would cause it fall back on a default value.

[Eddi]

"default values" are always unsafe in NewGRFs. either your vehicle replaces an existing vehicle, then the original value is kept, otherwise it's probably initialized to 0.